Steps to reproduce:
1. Set up Perforce workspace
2. Create project at least a level deeper than root directory
3. Create another folder in the root
4. Add files to the other folder
5. In the Editor set VC to Perforce and open Version Control window
6. In P4V, mark files from other folder for checkout
7. In the Editor VC window you can observe the checked out files even though you cannot do anything with them
8. Submit the default changeset
9. Error appears

Expected: No errors show up, In VC window the files from a higher level don't even show up
Actual: Error prevents submitting actual changes that would be alongside these checked out files

Error:
Version Control: Error in change specification.
Can't include file(s) not already opened.
Open new files with p4 add, p4 edit, etc.

Reproduced on: 2019.2.0a10, 2018.3.10f1, 2019.1.0b9, 2018.2.21f1